:^o 



The Pine? of Ai'strai.ia. 



Cross section showing how deeply placed is the oil cavity in each 

 leaf X 80. 



Thin longitudinal S'-ction .il<;o ilhistrates the liiddcn nature of an 

 oil cavity in a leaf, x 55, 



Sections to illustrate the remarks on the leaf oils of Callitris species. 



